Change base::TickClock to a ref counted class.

extensions/browser/api/cast_channel/logger.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/browser/api/cast_channel/logger.h"
 
 #include <string>
 
 #include "base/strings/string_util.h"
 #include "base/time/tick_clock.h"
@@ skipping 109 matching lines @@
 }
 
 }  // namespace
 
 Logger::AggregatedSocketEventLog::AggregatedSocketEventLog() {
 }
 
 Logger::AggregatedSocketEventLog::~AggregatedSocketEventLog() {
 }
 
-Logger::Logger(scoped_ptr<base::TickClock> clock,
+Logger::Logger(const scoped_refptr<base::TickClock>& clock,
                base::TimeTicks unix_epoch_time_ticks)
-    : clock_(clock.Pass()), unix_epoch_time_ticks_(unix_epoch_time_ticks) {
-  DCHECK(clock_);
+    : clock_(clock), unix_epoch_time_ticks_(unix_epoch_time_ticks) {
+  DCHECK(clock_.get() != NULL);
 
   // Logger may not be necessarily be created on the IO thread, but logging
   // happens exclusively there.
   thread_checker_.DetachFromThread();
 }
 
 Logger::~Logger() {
 }
 
 void Logger::LogNewSocketEvent(const CastSocket& cast_socket) {
@@ skipping 218 matching lines @@
   if (it != aggregated_socket_events_.end()) {
     return it->second->last_errors;
   } else {
     return LastErrors();
   }
 }
 
 }  // namespace cast_channel
 }  // namespace core_api
 }  // namespace extensions